Sorry for bumping an old topic, but I recently found this nice template and used it for my MEGA shield design.

Firstly, thanks for the effort, friend! I really like the 3D

However...It appears that the digital header is wrong. It is mirrored (or something like that). For example, IO23 pin is sitting next to the label of 22. This can be fixed easily by double clicking the hole and changing the NET.

Too bad I didn't catch this before submitting my PCB! Not a huge deal, though, since I can take care of it in software.

Improvements that can be made to the template:Fix the digital headerAdd a cutout around the USB connectorIncrease hole size to 40mil from 30mil for the headers